170 UNITED STATES AND MEXICAN BOUNDARY. 



mostly 4-lobed, the lobes notclied. Stamens usually 3, not exserted. Fruit oval, tlie margin 

 wingedj usually 4-6-toothed on eacli side, and reflexed over the back, so that the opposite sides 

 nearly meet^ and thus partially conceal two longitudinal dorsal rows o? spherical stipitate glands. 

 Achenium oblong, apiculate with the persistent base of the style. 



Abronia cycloptera, Gi^ay, I. c. p. 319. A. (Tripterocalyx) raicrantha, Torr. in Frem. 1st 

 Bep. p. 96. Sandy places on the Rio Grande, from Dona Ana to San Elceario, April, June ; 

 Wright, No. 1712, 



Abroj^ia arenariAj Menz. in Hook. Exot. Bot. t. 193 ; Clioisij, I. c. Sea beach, Monterey, 

 California; Parry. Flowers bright rose-color. Perennial fusiform root sometimes 4 feet long 

 and 2 inches in diameter. It is said to be eaten by the Indians. Common along the coast of 

 California^ and extending to Puget's Sound. 



* 



Abronia umeellata, Lam. 111. t. 5; Hook. I. c. t. 194; Choisy^ I. c. Abundant on the coast of 

 California. Eoot smaller and more branching than in the preceding species ; Parry. 



Abro^'IA mellipera, Dougl. in Hooh 



2879 ; Choisy^ I, c. Sandy hills near El 



Paso^ etc. J westward to the Colorado^ California^ April — June The wings are triangular and 



terminate abruptly at the summit, where they are dilated laterally, so that the fruit appears 

 truncated or turbinate. The body of the fruit is much shorter than in the next species. 



Abronia fragrans, Nutt. 3ISS,; Hooh. Keio Jour Bot. 5,^. 261 ; Torr. d Gray, Bot. Beck- 

 with Rep. p. 14j t. 10. Sandy hills on the upper Eio Grande^ and west to Chihuahua, April 

 to August. The mature fruit is distinctly but narrowly 5-winged. What was cited as a dwarf 

 form of A. mellifera in Bot. Whippl. Rejj. p. 131, is A. fragrans^ 



Nyctaginia capitatAj Choisy, I. c. Western Texas and valley of the Rio Grande^ common. 

 (No. 1709, Wright ; 680, Lindheimer^ dc.) 



AcLEiSANTHES LONGIFLORA, Gray^ l. c. (Tab. XLVI.) Sandy soils, western Texas and valley 

 of the Rio Grande, on both sides of the river, June — October. (No. 599 and 1704, Wright.) 

 The stamens and style are frequently much exserted in the later flowers, as they are in those of 

 A. Berlandieri. 



AcLEi^ANTHES ANisoPHYLLA, Gray ^ I. c. In alluvial soil, Turkey creek, and on Rio San Pedro, 



western Texas. (No. 598 and 1706, Wright.) 



AcLEiSANTHES Berlandieri, Gray ^ I, c. Nyctaginia obtusa, Choisy, I. c. p. 429. Near Laredo^ 

 lower Rio Grande, June ; Schott. (No. 1705, Wright; No. 1544, 2007, 3044, and 3203, Ber- 

 landier.) Leaves mostly acute. Flowers white, striped with pale purple. 



AcLEiSANTHES CRASSiFOLiA, Gray^ I. c. On the Rio Grande, from Los Moros up to the Pecos, 

 October; Schott. (No. 599a, Wright.) 



Pentacrophys Wrightii, Gray^ I. c. p. 318. (Tab. XL VII, B.) Rocky hills near Leon 

 Springs, Mexico, September ; Bigelow, Between Victoria and San Antonio, Texas ; Schott. In 

 all our specimens the flowers are expanded, with a slender tube an inch, and a half long and 

 exserted stamens. The fruit of these flowers differs from that of the unexpanded precociously 

 fructified ones from which Dr. Gray drew the generic character. The 5 glands, instead of being 

 j3rominent and crowning the fruit, are small, rather depressed, and seated on a neck or con- 

 stricted portion of the fruit a little below the summit. 



Selinocarpus CHENOPOmoiDES, Gray^ I. c. Gravelly hills and valleys on the Rio Grande^ from 

 El Paso to the Presidio del Norte, and westward to Ojo de Vaca, Chihuahua, April — July. 

 (No. 1707; Wright.) 



Selinocarpus ANGrsTiFOLius (u. sp.) : subviscoso-puberulus ; caule fruticuloso e basi ramosis- 



■1 



if. 



